3R,5R,E)-7-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoate) calcium(II)
3R,5R,E)-7-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoate) calcium(II) is an impurity found in bulk preparations of the HMG-CoA reductase inhibitor Rosuvastatin (HY-17504A).